Haskell Platform can't use OpenGL on OpenBSD.

[Thanos Tsouanas]

Solved!

In case anyone has similar problems, here's what I did.

Somehow my LDFLAGS were unset.
With LDFLAGS='-L/usr/X11R6/lib -L/usr/local/lib' it passed
that test, but still failed in a similar fashion at the next one.

In short, I had to install the GLUT library which is not
part of the system (see graphics/freeglut and graphics/glut).
Also, here are the env vars I had exported at the time of
my ./configure'ing:

CFLAGS='-I/usr/local/include -I/usr/X11R6/include -I/usr/include'
CPPFLAGS='-I/usr/X11R6/include -I/usr/local/include -I/usr/include'
LDFLAGS='-L/usr/X11R6/lib -L/usr/local/lib -L/usr/lib'
LD_LIBRARY_PATH=/usr/local/include:/usr/X11R6/include
LIBS=-lm
AUTOCONF_VERSION=2.62
AUTOMAKE_VERSION=1.9

Hope this helps.

Cheers.


On Wed, Mar 17, 2010 at 1:29 AM, Thanos Tsouanas <thanos at sians.org> wrote:
> Hello.
>
> I have successfully compiled ghc-6.10.4 on OpenBSD on i386.
> I have downloaded the Haskell Platform tarball, but ./configure
> fails:
>
> [ ... ]
> checking GL/gl.h usability... yes
> checking GL/gl.h presence... yes
> checking for GL/gl.h... yes
> checking for library containing glEnd... no
> configure: error: The OpenGL C library is required
>
> Looking into GL/gl.h, I see that the function glEnd is there:
>
> GLAPI void GLAPIENTRY glEnd( void );
>
> My system's GL/gl.h seems to be v7.4:
>  * Mesa 3-D graphics library
>  * Version:  7.4
>
> My config.log states the following, regarding OpenGL:
>
> [ ...lots of passed tests... ]
> configure:4247: checking GL/gl.h usability
> configure:4264: gcc -c -g -O2 -I/usr/X11R6/include
> -I/usr/local/include conftest.c >&5
> configure:4271: $? = 0
> configure:4285: result: yes
> configure:4289: checking GL/gl.h presence
> configure:4304: gcc -E -I/usr/X11R6/include -I/usr/local/include conftest.c
> configure:4311: $? = 0
> configure:4325: result: yes
> configure:4353: checking for GL/gl.h
> configure:4360: result: yes
> configure:4373: checking for library containing glEnd
> configure:4414: gcc -o conftest -g -O2 -I/usr/X11R6/include
> -I/usr/local/include conftest.c -lz  > &5
> /tmp//ccanY01U.o(.text+0x12): In function `main':
> /home/thanos/third/haskell/platform-6.10.4/haskell-platform-2009.2.0.2/conftest.c:30:
> undefined ref
> erence to `glEnd'
> collect2: ld returned 1 exit status
> configure:4421: $? = 1
> configure: failed program was:
> | /* confdefs.h.  */
> | #define PACKAGE_NAME "haskell-platform"
> | #define PACKAGE_TARNAME "haskell-platform"
> | #define PACKAGE_VERSION "2009.2.0.2"
> | #define PACKAGE_STRING "haskell-platform 2009.2.0.2"
> | #define PACKAGE_BUGREPORT ""
> | #define STDC_HEADERS 1
> | #define HAVE_SYS_TYPES_H 1
> | #define HAVE_SYS_STAT_H 1
> | #define HAVE_STDLIB_H 1
> | #define HAVE_STRING_H 1
> | #define HAVE_MEMORY_H 1
> | #define HAVE_STRINGS_H 1
> | #define HAVE_INTTYPES_H 1
> | #define HAVE_STDINT_H 1
> | #define HAVE_UNISTD_H 1
> | #define HAVE_LIBZ 1
> | /* end confdefs.h.  */
> |
> | /* Override any GCC internal prototype to avoid an error.
> |    Use char because int might match the return type of a GCC
> |    builtin and then its argument prototype would still apply.  */
> | #ifdef __cplusplus
> | extern "C"
> | #endif
> | char glEnd ();
> | int
> | main ()
> | {
> | return glEnd ();
> |   ;
> |   return 0;
> | }
>
>
> Now, I may not be a C programmer, but is this even supposed
> to work?  Testing this program is weird:
>
> conftest.c:5: error: conflicting types for `glEnd'
> /usr/X11R6/include/GL/gl.h:957: error: previous declaration of `glEnd'
>
> Which was expected, since glEnd is defined to return void in GL/gl.h,
> so I tried to delete that function declaration from this .c file, and I got:
>
> conftest.c: In function `main':
> conftest.c:8: error: void value not ignored as it ought to be
>
> Ok, this was expected, so I tried to delete the "return" and I got
> this final error:
>
> /tmp//ccq1Rmj0.o(.text+0x19): In function `main':
> : undefined reference to `glEnd'
> collect2: ld returned 1 exit status
>
>
> Please let me know if you have any ideas on how to procede with
> the installation of Haskell Platform.
>
> Thanks in advance.

-- 
Thanos Tsouanas
http://mpla.math.uoa.gr/~thanos/